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UPGRADE TO CDL PREMIUM
1.
Glad hands are used to:
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connect the service and emergency air lines from the truck or tractor to the trailer.
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connect the electrical lines from the truck or tractor to the trailer.
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connect the brakes from the truck or tractor to the trailer.
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2.
Most heavy trucks with manual transmissions require ____ to change gears.
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single clutching
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double clutching
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triple clutching
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3.
Longer combination vehicles have the tendency to swing wide on turns. This is called:
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jackknifing.
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hydroplaning.
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off-tracking.
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4.
If you must make an emergency stop, you should:
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brake in a way that will keep your vehicle in a straight line.
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use the hand brake before the brake pedal.
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apply the brakes as hard as you can to lock them.
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5.
When backing with a trailer, you should:
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check your mirrors on both sides frequently.
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look at your line of travel before you begin backing.
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All of the above.
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6.
How do you find out how many seconds of following distance you have?
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Pass a stationary object and count how many seconds it takes the vehicle ahead of you to reach the same spot.
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Wait until the vehicle ahead of you passes a pavement marking, shadow or landmark. Then count off the seconds until you reach the same spot.
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Wait until the vehicle ahead of you passes a pavement marking or some other clear landmark, then use the stopwatch on your mobile phone to see how long it takes you to reach the same spot.
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7.
The trailer hand valve should be used only:
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when the trailer is fully loaded.
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to test the trailer brakes.
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in driving to prevent skids.
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8.
In your mirror, you see a car approaching from the rear. The next time you check your mirror, you don't see the car. If you wish to change lanes, you should:
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wait until you are sure the car isn't in your blind spot.
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assume the car left the roadway and change lanes as normal.
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ease into the other lane slowly so the other car can get out of the way.
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9.
Which of the following is NOT a warning sign of fatigue?
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Driving at the speed of the traffic
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Frequent blinking
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Heavy eyelids
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10.
Combination vehicles usually require _________ single commercial vehicles.
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less driving skill than
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the same level of skill as
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more driving skill than
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